Formula One legend Michael Schumacher "will remain an invalid for the rest of his life" according to medical experts quoted by the British press.

The German racer who recovered from coma after a skiing accident in December last year was transferred from his hospital in the French town of Grenoble to a Swiss hospital earlier this week.

Doctors have said while revival from his state of induced coma is a positive sign, Schumacher has permanent damage.

He added that it is an incredibly positive message when someone wakes up after being in a coma for half a year, and it is believed that Schumacher would have made progress if he manages to sit up unaided in the next three months and operate an electric wheelchair in six.